Issue 8, 2010

High lithiumstorage in micrometre sized mesoporous spherical self-assembly of anatase titania nanospheres and carbon

Abstract

Composite of anatase titania (TiO2) nanospheres and carbon grown and self-assembled into micron-sized mesoporous spheres via a solvothermal synthesis route are discussed here in the context of rechargeable lithium-ion battery. The morphology and carbon content and hence the electrochemical performance are observed to be significantly influenced by the synthesis parameters. Synthesis conditions resulting in a mesoporous arrangement of an optimized amount carbon and TiO2 exhibited the best lithium battery performance. The first discharge cycle capacity of carbon-titania mesoporous spheres (solvothermal reaction at 150 °C at 6 h, calcination at 500 °C under air, BET surface area 80 m2g−1) was 334 mAhg−1 (approximately 1 Li) at current rate of 0.066 Ag−1. High storage capacity and good cyclability is attributed to the nanostructuring of TiO2 (mesoporosity) as well as due to formation of a percolation network of carbon around the TiO2 nanoparticles. The micron-sized mesoporous spheres of carbon-titania composite nanoparticles also show good rate cyclability in the range (0.066–6.67) Ag−1.

Graphical abstract: High lithium storage in micrometre sized mesoporous spherical self-assembly of anatase titania nanospheres and carbon

Supplementary files

Article information

Article type
Paper
Submitted
15 Sep 2009
Accepted
24 Nov 2009
First published
06 Jan 2010

J. Mater. Chem., 2010,20, 1600-1606

High lithium storage in micrometre sized mesoporous spherical self-assembly of anatase titania nanospheres and carbon

S. K. Das, S. Darmakolla and A. J. Bhattacharyya, J. Mater. Chem., 2010, 20, 1600 DOI: 10.1039/B919139A

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